多品种小批量轮番生产计划模型(英文).ppt

* 企业实践案例（英文资料）：“多品种 - 小批量轮番生产”均衡化生产计划与排程模型 Customer Production Fluctuation in lot size * Leveling method: Leveling the quantity per model and consistency of the model order. Leveling the quantity and production sequence takes place at the manufacturing resource. A preferably fine leveling simulates a ‘perfect’ customer who picks up regularly in small portions. Leveling supports the Continuous Improvement Process implying a reduction in lot size and therefore in replenishment lead time. Shortened replenishment lead times yield in increased flexibility (easy and fast adjustment to unanticipated disruptions such as changes in customer demand). Through a consistent customer demand, stock can be held on a minimum from the preliminary processes to the suppliers. * * Parameters for leveling Distinction into high and low runner: Models with high frequent and constant demand (high runner) Models with low frequent and/or uneven demand (low runner) Customer tact or demand quantity/frequency per model Capacity (offered by production ): Personnel (Shift model) MAE (OEE, change over time) Leveling period and withdrawal sequence Lot-size Planning period: replanning frequency of the leveling board Availability (parts quality, organizational interruptions, OEE) * Case study: Production program  based on change over optimization - units allocation Product Current Current EPEI ? recorded number demand / month demand / day fluctuations Change over/day ? A 5,600 280 +/- 10 % B 5,600 280 +/- 50 % C 5,600 280 +/- 50 % D 4,800 240 +/- 20 % E 4,000 200 +/- 25 % F 3,200 160 +/- 20 % G 3,200 160 +/- 15 % H 2,400 120 +/- 10 % a 480 24 ? b 480 24 ? c 320 16 ? d 320 16 ? e 160 8 ? f 80 4 ? g 80 4 ? h 80 4 ? i 80 4 ? j 80 4 ? k 80 4 ? l 40 2 ? m 40 2 ? n 40 2 ? o 40 2 ? 23 TTNr. 36.800 pcs 1840 pcs * Example: How often should we produce different part numbers ? Introduction EPEI = Every Part Every Interval Current situation: 23 part numbers *) customer dem